from info import db
from info.models import News, Comment, CommentLike
from info.modules.news import news_blu
from flask import render_template, current_app, g, abort, jsonify, request

from info.utils.comment import user_login_data
from info.utils.response_code import RET

# 点赞操作  的后端视图函数
@news_blu.route('/comment_like', methods=["POST"])
@user_login_data
def comment_like():
    # 判断用户是否登录
    user = g.user
    print("进入点赞视图函数")
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    # 1. 取到请求参数
    comment_id = request.json.get("comment_id")
    action = request.json.get("action")

    if not all([comment_id,action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["add", "remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment_id = int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 从根据新闻ID 从数据库里面取出新闻的相应数据
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")
    if not comment:
        return jsonify(errno =RET.NODATA,errmsg = "没有该数据")

    # 如果传来的参数是点赞操作,则将评论人id  以及新闻ID 传入数据库
    if action == "add":
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id == comment.id).first()
        if not comment_like_model:
            # 初始化 点赞的模型
            comment_like_model = CommentLike()
            comment_like_model.user_id = user.id
            comment_like_model.comment_id = comment.id
            db.session.add(comment_like_model)
            # 点赞数量+ 1
            comment.like_count += 1

    else:
        # 取消点赞评论
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id == comment.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            # 点赞数量减 一
            comment.like_count -= 1

    try:
        db.session.commit()

    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")

    return jsonify(errno=RET.OK, errmsg="OK")




# 评论新闻 操作
@news_blu.route('/news_comment',methods = ["POST"])
@user_login_data
def comment_news():
    user = g.user
    if not user:
        return jsonify(errno = RET.SESSIONERR,errmsg = "用户未登录")

    json_data = request.json
    news_id = json_data.get("news_id")
    comment_content = json_data.get("comment")
    parent_id = json_data.get("parent_id")

    if not all([news_id,comment_content]):
        return jsonify(errno = RET.PARAMERR,errmsg = "参数不足")

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno= RET.PARAMERR,errmsg = "参数错误")

    # 查询新闻 ID
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "数据库查询错误")

    if not news:
        return jsonify(errno = RET.NODATA,errmsg = "未找到该数据")

    # 初始化 comment 数据库模型,然后向数据库添加数据
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id

    # 向数据库添加数据
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno = RET.OK,errmsg = "发表成功")




@news_blu.route('/news_collect',methods=["POST"])
@user_login_data
def collect_news():
    user = g.user
    if not user:
        return jsonify(errno = RET.SESSIONERR,errmsg = "参数错误,用户未登录")
    print("*****6666666*****")
    print(user.id)

    json_data = request.json
    news_id = json_data.get("news_id")
    action = json_data.get("action")
    print(news_id)


    if not all ([news_id,action]):
        return jsonify(errno = RET.PARAMERR,errmsg = "参数错误")

    # 判断 action 里面没有这两个参数
    if action not in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    print("*****555555******")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno= RET.PARAMERR,errmsg = "参数错误")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "数据查询失败")

    if not news:
        return jsonify(errno = RET.NODATA,errmsg = "没有该数据")
    print("********44444*****")

    # 取消收藏以及收藏
    if action == "cancel_collect":
        if news in user.collection_news:
            user.collection_news.remove(news)

    else:
        if news not in user.collection_news:
            user.collection_news.append(news)

    return jsonify(errno = RET.OK,errmsg = "OK")





@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):

    """
    新闻详情
    :param news_id:
    :return:
    """
    # # 查询用户登录状态
    # user_id = session.get("user_id",None)
    # user = None
    #
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)
    # 判断用户是否登录
    user = g.user
    # 右侧新闻逻辑
    news_dict_Li = []
    for news in news_dict_Li:
        news_dict_Li.append(news.to_basic_dict())

    news = None
    # 查询该条新闻
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)

    # 访问该条新闻详情的话  新闻点击率 +1
    news.clicks += 1

    # 默认新闻没有被收藏
    is_collected = False

    if user:
        # 如果该用户 收藏的有该条新闻 ,将默认没有收藏改为收藏
        if news in user.collection_news:
            is_collected = True

    # 新闻详情页面展示评论信息

    comments = []
    # 数据库查询新闻评论 按照时间的倒序查找所有的新闻评论
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
        # 如果return 返回的话下面的代码将不执行 ,所以不可以return

        # return jsonify(errno=RET.DBERR,errmsg = "数据查询失败")


    comment_like_ids = []
    if g.user:
        try:
            # 需求：查询当前用户在当前新闻里面都点赞了哪些评论
            # 1. 查询出当前新闻的所有评论 ([COMMENT]) 取到所有的评论id  [1, 2, 3, 4, 5]
            comment_ids = [comment.id for comment in comments]
            # 2. 再查询当前评论中哪些评论被当前用户所点赞 （[CommentLike]）查询comment_id 在第1步的评论id列表内的所有数据 & CommentList.user_id = g.user.id
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id == g.user.id).all()
            # 3. 取到所有被点赞的评论id 第2步查询出来是一个 [CommentLike] --> [3, 5]
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]  # [3, 5]
        except Exception as e:
            current_app.logger.error(e)


    comment_dict_li =[]

    for comment in comments:
        comment_dict = comment.to_dict()


        # 代表没有点赞
        comment_dict["is_like"] = False
        # 判断当前遍历到的评论是否被当前登录用户所点赞
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True


        comment_dict_li.append(comment_dict)



    data={
        "user":user.to_dict() if user else None,
        "news_dict_li": news_dict_Li,
        "news":news.to_dict(),
        "is_collected":is_collected,
        "comments":comment_dict_li

    }


    return render_template("news/detail.html",data = data)
